The HeliCoil 5521-7 Thread Repair Kit is a coarse thread repair kit that is designed to repair damaged threads quickly and easily. The kit includes 8 pieces and is manufactured in the United States. It is suitable for use in the automotive industry and is backed by a 1-year warranty. The kit is designed for use with SAE system of measurement and is a set item. The brand of the kit is Helicoil, and the manufacturer part number is 5521-7. The kit is available for purchase with fast and free shipping.